add clipping examples

lizenz_cc_lizenzen.pgf

@@ -33,6 +33,10 @@
 %	node distance=5mm,
 ]
 
+\clip<2>(0,0)rectangle(\textwidth,-\textheight);
+\clip<3>(\textwidth,0)rectangle(2\textwidth,-\textheight);
+
+
 \node [st]  (we) {Werk};
 \node [cn, below =of we] (wt) {Werk teilen?};
 \node [cn, right =of wt] (na) {Namensnenung};